PA21A

SUPPLY VOLTAGE, total                                                              5V to 40V
OUTPUT CURRENT                                                                      SOA
POWER DISSIPATION, internal (per amplifier)                            25W
POWER DISSIPATION, internal (both amplifiers)                        36W
INPUT VOLTAGE, differential                                                       ±V_S
INPUT VOLTAGE, common mode                                                 +VS, -VS.5V
JUNCTION TEMPERATURE, max1                                                 150°C
TEMPERATURE, pin solder-10 sec max                                      300°C
TEMPERATURE RANGE, storage                                                  65°C to 150°C
OPERATING TEMPERATURE RANGE, case                                    55°C to 125°C

The amplifiers PA21A consist of a monolithic dual power op amp in a 8-pin hermetic TO-3 package (PA21 and PA25) and a 12-pin SIP package (PA26). Putting two power op amps in one package and on one die results in an extremely cost effective solution for applications requiring multiple amplifiers per board or bridge mode configurations.

The wide common mode input range of PA21A includes the negative rail, facilitating single supply applications. It is possible to have a "ground based" input driving a single supply amplifier with ground acting as the "second" or "bottom"supply of the amplifier.

The output stages of PA21A are also well protected. They possess internal current limit circuits. While the device is well pro-tected, the Safe Operating Area (SOA) curve must be observed. Proper heatsinking is required for maximum reliabil-ity.

This hybrid integrated circuit utilizes thick film (cermet)resistors PA21A, ceramic capacitors and semiconductor chips to maximize reliability, minimize size and give top performance.Ultrasonically bonded aluminum wires provide reliable interconnections at all operating temperatures. The 8-pin TO-3 package is hermetically sealed and electrically isolated. The use of compressible isolation washers voids the warranty. The tab of the SIP12 plastic package is tied to VS.